Romans 8:26 : And in like manner the Spirit also help-eth our infirmity: for we know not how to pray as we ought; but the Spirit himself maketh intercession for us with groanings which cannot be uttered. Or unutterable groanings. Hope helps us to endure afflictions, and in like manner the Spirit helps us in our infirmities. Perhaps there is more in this than we know. The infirmity here mentioned is that we know not how to pray as we ought to pray. What we already know about how to pray we learned through the teaching of the Holy Spirit.
And there are urgings and longings in the heart of a sincere child of God that he cannot ex-press. He has a feeling of helplessness, or of a deep need, without knowing what that need really is, or what would meet the need. It is what Paul calls "unutterable groanings." It is the groaning within ourselves mentioned in Romans 8:23. These groanings are silent groanings--unutterable feelings of need. The Spirit helps us in these groanings, for he understands our needs and longings and can make them known to God.